Grinder



July 23, 1 940.

H. J. MANKQFF 2,209,277

GRI NDER Filed Jn. 21, 1937 2 Sheets-Sheet l July 23, 19.40 H. J.MANKOFF GRINDER Filed Jan. 21, 1937 2 Sheets-Sheet 2 Patented July 23,1940 UNITED STAT-ES PATENT-'OFFRE 2,209,2'r7fl GRINDER Henry JohnMankoff, Wichita, Kans. y Application January 21, 1337,- Serial No.121,700

1 Claim.

'Ihis invention relates to grinding machines, and more particularly togrinding machines embodying rotary hammer blades, such as shown anddescribed in .my pending application filed September 20, 1936, SerialNo. 103,032, now Patent No. 2,158,240, primarily designed for grindingcompost, feed or like material.

An important object of the invention is to provide a machine of thischaracter so constructed 1 that extremely wet compost material may beeilciently ground by the machine, without danger of the machineclogging.

A further object of the invention is to provide a plurality of spacedrollers forming the bottom of the rotary hammer chamber, the rollersbeing constructed in such a way that the rotary hammer blades willoperate in close relation with respect to the rollers, at the pointwhere the material enters the hammer blade chamber, thereby insuring thecutting and grinding of the material where the material is heaviest.

A still further object of the invention is to provide a machine of thischaracter having a screening member in the form of rollers, which act tomove under the action of the rotary blades, freeing the material anddirecting the material downwardly between the roller.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it

being understood that changes in the precise embodiment of the inventionherein described, may be made within the scope of what is claimed,without departing from the spirit of the invention.

Referring to the drawings:

Figure 1 is a front elevational view of a grinding machine constructedin accordance with the invention.

Figure 2 is a sectional view taken on line 2--2 of Figure 1.

Figure 3 is a fragmental detail View illustrating the means forsupporting the rollers.

Referring to the drawings in detail, the grinding machine comprises abody portion indicated generally by the reference character 5, the bodyportion comprising end plates 6 which are held in spaced relation witheach other by means of the plate 1 secured to the rear edges of theplates 6, and the plate 8 secured to the forward edges of the end plates6.

The lower edges of the end plates 6 are cut away providing legs 9, whichhold the body portion in spaced relation with the surface on which (Ci.i3-111 the body portion stands. As clearly shown by -the drawings, theplate 1 extends upwardly Where it connects with the bottom of theinclined trough Ill, which trough has its front end open to provide aclearance for the adjustable apron II, and 5 at the same time providinga passageway for material entering the body portion of the machine.

The adjustable apron II is formed with a substantially wide uppersection and a curved lower 10 section I I An opening is formed along thelower edge of the curved section II and is adapted to receive the rod20, when the apron is in the position as indicated in full lines inFigure 2. Straps 2| are secured to the apron II and under 15 which therod 22 extends, securing the apron to the rod. When the apron is movedto the position shown by dotted lines in Figure 2 of the drawings, theopening along the lower edge of the curved section II' accommodates theupper 20 rod I2, while the rod 20 is extended under the straps 2l, thusclosing the body portion through the hopper.

Mounted within the body portion 5 and disposed between the end plates 6,are rods I2 on 25 which hollow rollers I3 are mounted, the rollers beingarranged in a curved line, and spaced apart so that material may passtherebetween. As clearly shown by Figure 2 of the drawings, the rods I2at one end of the line of rollers, are 30 substantially large andsupport substantially large rollers I3. Due to this construction, itwill be seen that the roll-ers I3 at the feed end of the body portion,will be disposed near the cutting blades of the hammers, insuring thecutting of the material at this point, to prevent the material fromclogging.

It might be further stated that the end plates 6 have curved portionsthat carry out the general contour of the curved lines of the rollersI3, providing a substantially circular housing in which the blades I4operate. These blades are mounted on the shaft I5, which extends throughthe body portion, and is provid-ed with a pulley I6 overwhich a powerbelt, not shown, operates to transmit rotary movement to the shaft andblades. 45 Mounted between the end plates 6, is a pivoted plate Il whichacts as a guard to control the material which is fed into the machine,and prevents the material from piling to clog the machine. Hopper I8 isprovided atthe forward portion of the body portion 5, and is so arrangedthat material fed into the machine through this hopper, will be directedto the blades I4. This hopper I8 is used for feeding material to themachine, when the material is exceptionally wet. 55

It might be further stated that the shafts' or rods l2 on which therollers I3 are mounted, have their ends extended' through openings inthe end plates 6 of the body portion, eliminating the usual supportingplates employed in supporting rods of this type, and on which thematerial usually collects to clog the machine.

Due to the construction of the rollers, the rollers will retard thematerial at a point until the `materialis thoroughly pulverized. When`the material has been thoroughly pulverized, the material drops throughthe spaces between the rollers, and since these rollers are constantlyrotating, the material will be carried throughl the spaces, preventingclogging of the material.

What is claimed is: o

A4 grinding machine comprising a body portion including a beater casing,a rotary grinding member mounted within the body portion, a

trough and hopper communicating with the bodyV portion at opposite sidesof a vertical line drawn through the axis of the rotary grinding member,a screening member comprising spaced rollers mounted within the bodyportion and arranged in the arc of a circle, said grinding memd bercooperating with the rollers in grinding material fed into the bodyportion through the trough and hopper, an adjustable dei-lector memberincluding a curved lower portion, adjustably mounted Within the bodyportion between the trough and hopper, said lower curved portion of thedeecting member being coextensive with the screening member in one ofits positions of adjustment, and said deector being normally 15 arrangedin spaced cooperative feeding relation with the trough and adapted toopenV and close the hopper discharge to the beater casing.

HENRY `JOHN' MANKOFF.

